Block pavement



i ffm f' Y H. G. JENNISON.

BLOCK PAVEMENT.

Arpucmon mio nu. 1. |911.

Patented May 25,1920.

FIEIJ UNITED STATES HARRY G. JENNISON, OF TOLEDO, OHIO. ,i

BLOCK PAVEMENT.

Specification of Letters Patent.

Patented May 25, 1920.

Application led March 7, 1917. Serial No. 152,970.

To all whom t may com-cm.'

Be it known that I, HARRY G. JENNISON, a citizen of the United States of America, residing at Toledo, Lucas county, Ohio, have invented new and useful Block' Pavements, of which the Jfollowing is a specification.

This invention relates to block pavements and means for initially spacing the blocks.

This invention has utility when incorporated in wood block pavement more particularly in the provision on a block of yieldable spacing means susceptible to distortion in responding to block disturbance', as weathering.

ei'erring to the drawings:

Figure l is a perspective view of a multiple length block section or plank ot the cross-sectional area desired to have for the block;

Fig. 2 is a similar view of such section with the continuous seats or grooved means formed therein;

Fig. 3 is a perspective view of this multiple length block section with the spacing means seated in the grooves;

Fig. Zlis a perspective view of a block cut from the multiple length section with its spacing means assembled therewith as a unit; l

Fig. 5 is a perspective view of a pavement section, say for street work embodying the blockso Fig. 4C as assembled; and

Fig. 6 is a perspective view of the wood block pavement as developing in use showing the action of the spacing means in crushing down as adapting to block changes.

In the laying of pavement, it is natural in order to line-up the blocks that they should be placed in contacting relation not only to preserve the staggering but the general pavement lines. Such setting for wood blocks is objectionable even with the impregnation say with waterproofing substances for temperature and weather conditions enter to disturb cross-sectional 'area of the block notwithstanding the block ,may maintain a thoroughly aseptic condition.

The invention herein takes into account the desirability of placing the blocks into abutting relation but automatically provides a spacing between the blocks. In this spac ing there is a projection'from one lblock operating as a means for determining a spaced relation between it and the adjoining block but such spacing provision is of a nature and extent distinguishing from a posif sition or plastic binder.

This spacer formed in a groove or grooves throughout their length is of small contacting region at its exposed edge and the spacer is in its nature crushable or yieldable under load strain but of suilicient toughness and permanence for permitting the handling in shipment and laying. VIn its nature it is somewhat of an elastic mastic.

From this continuous length or multiple block section with the spacer therein are cut the blocks i of a length along the plank to bring them to a height oi block desired with the wear face of thc block across the grain of the wood, or with the grain oit' the wood running away from the wear face. This completed block 4L with the spacing means 3 is of a form for ready aseptic treatment, impregnation or waterproong as desired say with a hydro-carbon.

This block 3 is assembled in staggered relation in the pavement with its spacing means coacting with the adjacent blocks on the sides where the spacing means are absent. In some instances the narrow way spacing means of the blocks may be dispensed with and the terminal spacing means only used for the block distortion due to weathering is more in this direction of the block when thev age rings of the blocks approximate this direction.

As the pavement is installed with these crushable edges of the spacing means 3 abutting adjacent blocks the use and weathering conditions act upon the blocks in tending to work the blocks into closer relation. This is permitted by the lugs or spacing means 3 running away from the pavement surface notwithstanding the interstices between the blocks may be brushed in or lilled with a iiller say of sand and a hydro-carbon with suiiicient hydro-carbon to flux the sand under compression strains. Accordingly, the blocks oi' the pavement remain placed, the

for even in the event of. moisture attempted attacks the grooves are bottomless to allow the moistureito pass down the grooves as readily as down the block side. In the co1npression movement the small contact edges of the spacing means 3 as to relative greater side area of the blocks may give Vway more or less to produce the means The prepara tion of the plank to provide the spacing means; while removing some of the wood to form a seat, does not detract from the crosssectional varea of the plank to be used in the pavement, while the addition to the .plank of the spacing meansreally increases the cross-sectional area' and accordingly is a factor in reducing lumber expense.

That is claimed and it is desired to secure j groove projecting out of said block toward the adjacent block, said strip vextending from the pavement face to the base of the paveacting with the projecting spacing strip in allowing the spaced blocks of the pavement to vary the spacing distance therebetween by crowding into such space.

2. A pavement comprising wood blocks of i in saio groove and having a narrow com.

pressible edge projecting therefrom to position the vertical face ot' the adjacent block initially in spaced relation from the block mounting the element.

nnent, and a yieldable iller in said joint co- 3. A paving block of rectangular 'ormation, a groove or grooves formed in vertical relation-in one or more of the side acesoi'ry said block, means iitted in the said groove or 7 grooves for spacing the said blocks apart when regularly placed together, as and for the purpose specified.

ln witness whereof I ax my signature.

j HARRY Gr. JENNISON., 

